Software Developer - HMRC - HEO

Full-time (Permanent) National £37,682 - £40,705. London £42,631 - £46,077

• Bristol Regional Centre - 3 Glass Wharf
• Edinburgh Regional Centre - Queen Elizabeth House
• Glasgow Regional Centre - Atlantic Square
• Stratford Regional Centre - Westfield Avenue
• Telford - Plaza 1 and 2
• Worthing - Teville Gate House

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HMRC is transforming the UK’s tax system through cutting‑edge digital innovation and the Chief Digital and Information Officer (CDIO) Group is at the heart of that mission.

We are building high‑quality digital services that will enhance the customer experience, enable real‑time interactions, and make tax simpler and more intuitive for everyone. By equipping our colleagues with modern tools and technologies, we are also reshaping how we work — allowing HMRC to focus its resources where they can deliver the greatest impact.

The Valuation Office Agency (VOA) are currently undergoing a transformation programme to replace legacy applications with Software‑as‑a‑Service (SaaS) and Platform‑as‑a‑Service (PaaS) cloud solutions.

An individual with strong experience in Software‑as‑a‑Service (SaaS) and Platform‑as‑a‑Service (PaaS) cloud solutions, as well as a solid background in supporting legacy applications, is essential.

As a .NET Developer, you will play a key role within the CDIO Chief Digital Product Office (CDPO) development team, contributing to the design, development, and maintenance of high‑quality software products. This position involves working across disciplines to deliver secure, reliable, and user‑centred digital services that meet HMRC standards and stakeholder objectives.

Key responsibilities

• Development of VOA applications in the modern Azure estate.
• Development and support of VOA’s suite of legacy applications built using Visual Basic 6 or Microsoft .NET, including:
  • Reval Defence Tool
  • Communication Masts.
• Designing, developing, and maintaining .NET applications and services, ensuring performance, scalability, and compliance with best practices.
• Collaborating with product managers, business analysts, and software developers to deliver solutions aligned with user needs and organisational goals.
• Implementing and optimising CI/CD pipelines and automation to improve deployment efficiency and operational resilience.
• Supporting Dev Ops practices, including monitoring, troubleshooting, and continuous improvement of cloud‑hosted applications.
• Contributing to technical design discussions and ensuring adherence to coding standards and security guidelines.
• Designing and implementing Valuation‑based rules services using industry standard engines (InRule, ).
• Experience of developing and maintaining high‑performance applications using .NET, C#.
• Development and support of legacy applications built using Visual Basic 6, VBA, and Microsoft .NET.
• Demonstrable foundation in software engineering principles and best practices such as RESTful API design, microservices, object‑oriented design, and code optimisation.
• Hands‑on experience with cloud technologies, preferably Microsoft Azure.
• Strong proficiency in SQL and experience with either relational or No
  
  SQL databases.
• Experience with CI/CD pipelines, preferably using Azure Dev Ops.
• Demonstrable strong problem‑solving, debugging, teamwork, and communication abilities.
• Proven experience in designing, configuring, and managing APIs using Azure API Management (APIM), including implementing and customising APIM policies for security, transformation, and traffic control.
• Development of VOA applications in the modern Azure estate, centred around the Data Services Layer, Microsoft Dynamics and the Valuation rules engine.
• Experience with APIM policy design, Azure App Service configuration, and observability (App Insights, alerts).
• Hands‑on experience delivering solution using IaC tools (Bicep and ARM templates)

We'll assess you against these behaviours during the selection process: